Vertical Blinds Installation Narrative
A drapery store manager was interested in determining whether a new employee can install vertical blinds faster than an employee who has been with the company for two years. The manager takes independent samples of ten vertical blind installations of each of the two employees and computes the following information. 
-Refer to Vertical Blinds Installation Narrative. Calculate the pooled estimate of the common variance
Definitions:
Capital Balances
The amount of money invested in a business by its owners or shareholders, shown on a company's balance sheet.
Net Income
The total profit of a company after all expenses have been deducted from revenue, indicating the company's financial performance in a given period.
Income Ratio
A financial metric comparing two aspects of a company's income, often used to assess financial health or operational efficiency.
Original Investments
The initial amount of money put into a venture, project, or asset, serving as the basis for generating earnings or losses.
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